Machine-reamer



H. JUNG.

MACHINEREAMER. APPLICATION man lunezo, |919.

/' l jg?. 1.

Il Il' HENRY JUNG, or NonWooD, OHIO.

Application led June 20, 1919.v Serial No. 305,600.

To all 'whom t may concern:

Be itlmown that I, HENRY JUNG, .an alien German, and a resident ofNorwood, in the county of Hamilton and StateA of Ohio, have invented 'acertain new and useful Improvement in Machine-Beamers, of which thefollowing is a specification.

This invention relates to machlne-reamers,

or more especially-to those of the expansion,

radially-adjustablecutter-blade type and toinclude hand-'reamers aswell; and the object and consistency thereof are to provide acircumferential series of cutter-blades that are set free to be moved orslid both lengthwise and radiallyin open, longitudinal slots or`narrowseat-ways made in the outer end ofthe reamer-head, suchcutter-blades having inclined or sloped inner longitudinal edges, and tofurther provide 'a conical spreader that is free to be .reciprocated orslid along the outer tip-end of the reamerspindle andv whose facecoincides indegree with thatof the inner sloping longitudinal edges kofthe cutter-blades, a pilot-ring or carrier-sleeve for use in adjustingthe said spreader along the said outer tip-end of the spindle and havinga deep peripheral iange or rim, a ring or washer detachablysecured tothe open-slotted end of the reamer-head and having VVset-,screws whoseinner ends are adapted to .engage the outer ends of the cutter-bladesforholding the latter in adjusted longitudinal position in'theirrespectivek slots or narrow seat-ways and the said Y deep flange or rimon the pilot-sleeve oon- Y tacting with the outer face of the saidWasher to cover the screw-heads and thereby f preventthe accidentalretreat or withdrawal of the screws themselves, and a lock-nut on theeXtreme outer, screw-threaded ltip-end of the spindle for preventing theconical spreader and its carrier-sleeve retreating' `from set positiononthe said spindle when the reamer is in an operative stateready for andduring actual use. f l

AThe details of structure will be fully hereinafter described and thenmore particularly pointed out inthe yclaims that follow.

In the accompanying sheet of drawings,- Figure 1 is a longitudinalelevation of my vimproved reamer, the same being shown,

las

however, in horizontal position and with est .expanded position inthe.head;

Fig. V2, an axial,y longitudinal-[section of :its cutter-blades in theirinnermost or slight- MACHINE-REAMER.

` Speccation of Letters Patent. i

, dotted-line 3, 3, of

Patented Dec; 9, L1919.

Velevation Fig. 3, a transverse sectiontaken.on .the

Fig. 1;

Y F ig. 4, 'a transverse section-taken-on the dotted-line 4, V4', ofFig. l;v f

Fig. 5, a fore-end elevation ofthe device; Fig. 6, a side elevation ofthev conical l.cutter-bladespreader or expander forming one of thelmamfeatures'of the invention herein; and- Fig. 7,; a .perspective viewofone ofthe .Cutter-blades shown in .itspreferred form.

In these views, 8 indicates the usual mounting-end of the spindle,having the reducedv fore-portion 9 vand the still further reducedfore-endor eXtreme tip 10, the latterl being screw-threadedpart length,'as

best seen in Fig. 2. l

llrindicates a tubular head or sleeve keyedv to the portion 9 of thespindle and extending forwardly over the reduced' tip-end 10 of saidspindle so as to leave an annulus 11a for accommodating a 'conicalspreader 12 `whose circular rear-extension 13 is outwardlyscrew-threaded andit has asmooth bore for-enabling it to pass freelyalong the said tip-end 1 0 'of the spindle, as best seen in Fig.V 2,

That part of the Vtubular head or sleeve 11 extendingl over the tip-end10 of the spindle -is provided with a circumferential series ofequdistant longitudinal slots or narrow seatways 14 to accommodatecutterblades 15 whose outer edges extend normally a slightdistancebeyond the outer `faceor periphery of the said tubularhead-or sleeve 11and whose inner edgesl are sloped, asV ,shown at 16, to correspond tothe slope of the conical spreader 12, the slope of both beingpreferably, but not essentially, ten degrees, which is sufficient tofacilitate the outwardexpansive movement of the cutterblades beyond theface or pe'ripheryof the head 11. .Y

A ring or washer I17 is fastened by "means ,ofscrews 18 `to the outer'end of the openslotted-head 11 and additional set-screws 19 are used insaid ring for independently vholding the cutter-blades 15 1n their seatways 14 against longitudinal movement, as wellas outward radialmovement, the cutterblades being by preference a little shorter than thelength ofthe seat-ways when it is the .intention that thesaid-ring-shall not ifb'ear Y directly in contact with thecutter-bladesin the use of the tool and it being further 1ntended to usethe width or thickness of the ring, as well as the slight space 15abetween the outer ends of the cutter-blades and the ring to afford anadvance aligning-bearing for the tool in the hole to be reamed out andforming an important feature of my invention herein. The set-screws 19have no heads, but the fastening-screws 18 have inwardly-beveled headsthat engage countersunk openings made in the outer face of the ring orwasher 17 so that they may seat flush with the said outer face of thewasher. Ordinarily, three of the fastening-screws 18 are sufficient,and, of course, a set-screw 19 vfor each cutter-blade, as best shown(dotted) in Fig. 5. As thus far specifically described, thecutter-blades are best approached for inserting and adjusting in theirseat-ways by simply loosening the setvscrews 19 and manipulating theconical spreader 12 backward or forward to suit the dista-nce the saidcutter-blades shall project beyond the face of the head 11, the saidslight space 15a provided by making the blades shorter than theirseat-ways being utilized for the insertion of a pointed instrument andthe ready movementof the blades to suit the position they are to occupyin the head effected.V

Thus the ring or washer 17 need not be removed from place on the end ofthe head,

' unless it be otherwise desired to remove the blades lengthwise fromtheir seat-ways and replaced by others or for repairs.

To enable a ready adjustment of the blades, especially outwardly intheir seatways, l provide a pilot-ring 20 that is internallyscrew-threaded for engagement with the outwardly-threaded extension 13of the conical spreader 12, a multiple flatfaeed formation, heXagonnut-fashion, 21 being constructed on the outer portion of thepilot-ringforthe use of a wrench in applying the pilot-ring to and fro along thesaid threaded rear-end 13 of the spreader. The pilot-ring is furtherprovided with a flange 22 of sufcient diameter to cover the face of thering or washer 17 and thus effectually prevent the escape of the screwsfrom the said washer 17 when the parts of the device are assembled andin use.

An outer lock-nut 23 is mounted on the threaded end of the spindle tip10 to close and hold the pilot-ring 20 in place on the threadedextension 13 of the conical spreader 12, and, in turn, said conicalspreader in expanded position in contact with the sloped inner faces ofthe blades, and, also, to hold the flanged inner face of the saidpilot-ring 2O in contact with the outer face of the washer 17 for thepurpose above described in connection with preventing the release ofthescrews from place in said washer..

An elongated pin 211 extends from the face of the conical spreader 12for engagement in the annulus 11a of the head or sleeve 11 between theinner sloped edges of any adjacent pairs of blades 15, as best shown inFig. L1, but well shown, otherwise, in Figs. 2, 3 and 6, for the purposeof preventing the rotation of the conical 'spreader when it is desiredto rotate the pilot-ring 2O for advancing or retreating it along thethreaded rear-extension 13 of said spreader, and especially when it isdesired to use the spreader in expanding or outwardly-protruding thecutter-blades for reaming out bores of larger diameters. V

It is obvious, withoutv going into any lengthy detailed description,that the structure herein is well adapted for use as a handreanier, oras an eXpansible-tap for varied uses, the cutter-blades being adaptedtobe made quite long for the hand-reamer, or

longer than for the machine or power-driven reamer.

I claim 1. A reamer comprising a spindle, a head or sleeve keyedthereto, a partially threaded shoulder tip at the outer end of saidspindle, open slots or seat-ways in said head ory sleeve, cutter-bladeshaving sloped inner edges and freely engaging the said open slots orseat-ways, a ring or washer mounted on the outer open-slotted end of thesaid head, fastening-screws in said washer, setscrews in said washer forholding the cutter-blades in adjusted position to suit the diameter ofhole to be reamed, an annulus between the said tip of the spindle andthe open-slotted end of the said head, a conical spreader-provided insaid annulus and having a smooth bore for free reciprocal-engagementover said spindle-tip and in contact with the inner sloped edges of thesaid cutter-blades, a threaded rear-extension on said conical spreader,a pilot-ring having threaded-engagement with the said threadedrear-extension on the conical blade-spreader, and means on the outer endof the spindletip for engagement with the said pilot-ring for holdingitin adjusted position in connection with the expanded or protrudedcutter-blades to suit the desired bore of the hole to be reamed.

2. A reamerA comprising a shouldered n spindle having a reduced outerend or tip that is partially screw-threaded, a cylindrical head orsleeve keyed to the spindle to the rear of said tip, openslots orseat-ways in the outer end of said head beginning in line with the innerend of said spindle-tip and extending part way only the length of saidtip, an annulus between the said spindle-tip and the open-slotted end ofsaid head, cutter-blades mounted free to be moved in said open slots orseat-ways andV having sloped inner edges, a ring or washer' 130deachably-mounted on the outer openslotted end of the head, set-screvvsin said ring or Washer for holding the cutter-blades in adjustedposition in the open-slotted end of the head, a conical spreader in saidannulus and having a smooth bore for free reciprocal-engagement oversaid spindle-tip and in expanding or outwardly-spreading contact withthe inner sloped edges of the cutterblades, a threaded rear-extension onsaid conical spreader, a pilot-ring having threaded-engagement With thesaid threaded rearextension on the conical blade-spreader, a flangealong the periphery of said pilot-ring to contact with the outer face ofthe said Washer and to prevent the outward escape or retreat of thescrews in said Washer, a locknut on the outer end of the spindle-tip forengagement With the outer face of said pilot-ring and to hold thecutter-blades in adjusted position, and a stop-pin on the conicalspreader for lateral engagement With the sides of the inner edges of anyadjacent pairs of cutter-blades to prevent the turning of the conicalspreader on the spindletip when the pilot-ring is turned along thethreaded rear-extension of the said conical spreader in the adjustmentof the said cutter-blades.

HENRY JUNG.

